I would like to recommend these. It’s probably not for the people in here, but certainly for parents, grandparents, friends and colleagues… who may not be as “into” it and therefore a little more vulnerable. (I’ve already sent them to the members of my own family.) It’s a couple of short guides, making it easier to spot different kinds of fraud. One of them also in audio format. (The “Little Book of Big Scams” is just a 40 page booklet, with large font and many pictures, so the word ‘book’ be a reason to leave it unread.)
1: https://www.nationwide.co.uk/-/media/MainSite/documents/support/security-centre/fraud-leaflets/how-to-spot-a-scam-pocket-guide.pdf
2: https://www.met.police.uk/SysSiteAssets/media/downloads/central/advice/fraud/met/the-little-book-of-big-scams.pdf
(Audio: https://soundcloud.com/metropolitan-police/the-little-book-of-big-scams)